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Dec. 4, 192's. 9 1,694,299 I C. WINKLER MACHINE, FOR CASTING CURVED STEREOPLATES Filed April 22, 1927 INVENTOR (A/ 1 W/NKLEQ ATTORNEY Patented Dec, 4-, ltdz i BEAGIEIINE FOR CASTING CUBVED STEREOPLATES.

Application filed April 22, 1927, Serial No. 185,853, and in Germany July 1?, 1926.

In casting curved stereoplates in a caster in which the casting box is pressed against the outlet of the melting pot and in which a cock is used to control the flow of molten :3 metal into the casting box, it has been found necessary, in some cases, to reduce the distance between the matter and edge of the plate. For this purpose, the bearing of the 506k, according to my present invention, on

the side on which the matrix clamp of the casting box presses, is made thinner than on the other side against which the core of the casting box presses. Preferably the outlet opening of the melting pot is not provided at the thinnest part of the cock casing, but somewhat further to the front, so that the wall at the part of the casing against which the matrix clamp presses, in spite of the fact that it is thinner than the wall behind the outlet opening, will still have a sufficient thickness.

On the accompanying drawing my inven tion is illustrated, by way of example, in a section passing through the cock casing, and the adjacent parts of the casting box.

The wall a of the melting pot forms the casing 7) in which the cock turns, in order to open and close the outlet slot 0, and to cut off the cast plate from the contents of the melting pot. For the casting operation the inlet opening of the casting box (Z is brought to register exactly with the outlet opening 0 without any free space between. The box consists of the core a and bed In order to hold the matrix 9 in position a matrix clamp h is provided on the bed 7, which matrix, in the casting position of the box, presses against the wall aof the pot.

With the object of bringing the edge of the stereoplate which is cut by the cock in closing as near as possible to the matter, which begins immediately under the matrix clamp, this clamp projects above the level of the core and presses against the wall ?I of the pot which is set back somewhat. in spite of this arrangement the wall 2' can be made sutliciently strong by placing the outlet slot somewhat in front of a line in passing through the axis of the cock casing perpendicular to the surface against which the casting box presses, thus somewhat in front of the point It", so that the outlet slot will be located where the wall of the cock casing is thinner than at any other point, as shown in the drawing.

What I claim and desire to secure by Letters Patent of the United States is:

In a machine for casting curred stereotype plates, a melting pot having its lower portion reduced in thickness and provided therein with an outlet slot controlled by a cock, the slot being so located in the reduced portion of the petthat it will be in advance of a vertical line passing through the axis of the cock and its rear wall will be of greater height than its front wall, and a casting box adapted to be pressed. against the melting pot.

In testimony whereof I have signed my name to this specification.

CARL VVINKLER. 

